Cruz-Muñoz, Francisco JavierRomero Ordóñez, AntonioTadeu, AntònioGalvín, Pedro2018-05-182018-05-182017Cruz-Muñoz, F.J., Romero Ordóñez, A., Tadeu, A. y Galvín, P. (2017). A 2.5D spectral approach to represent acoustic and elastic waveguides interaction on thin slab structures.En 10th International Conference on Structural Dynamics, EURODYN 2017. Procedia Engineering, 199, 1374-1379.1877-7058https://hdl.handle.net/11441/74824Faculty of Civil and Industrial Engineering; Rome; Italy; 10 September 2017 through 13 September 2017In this paper, we propose a spectral element method (SEM) to study guided waves in coupled problems involving thin-walled structures and fluid-acoustic cavities. The numerical method is based on the subdomain decomposition of the fluid-structure system. Two spectral elements are developed to represent the fluid and the structure. A plate element based on a mixed ReissnerMindlin and Kirchhoff-Love formulation is proposed to represent the thin-walled structure. This element uses C0 approximation functions to overcome the difficulties to formulate elements with arbitrary order from C1 functions. The proposed element uses a substitute transverse shear strain field resulting free shear locking. The fluid element is derived from the Helmholtz equation. These elements use Lagrange polynomials as shape functions at the Legendre-Gauss-Lobatto (LGL) points. The analysis is carried out by a two-and-a-half dimension (2.5D) approach in the wavenumber-frequency domain. The guided wave in a fluid cavity with a flexible side is analysed.application/pdfengAtribución-NoComercial-SinDerivadas 3.0 Estados Unidos de Américahttp://creativecommons.org/licenses/by-nc-nd/4.0/Fluid waveguideSolid waveguideTwo-and-a-half dimensionSpectral element methodAcousticShear lockinginfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1016/j.proeng.2017.09.362